<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card class="box-card">
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级、三级权限 -->
              <el-col :span="19">
                <!-- 通过for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              size="mini"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRolesById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-search"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主题 -->
      <el-form
        :model="addForm"
        label-position="left"
        label-width="80px"
        :rules="FormRules"
        ref="addFormRef"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">
          确 定
        </el-button>
      </span>
    </el-dialog>
    <!-- 编辑对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主题 -->
      <el-form
        :model="editForm"
        label-position="left"
        label-width="80px"
        :rules="FormRules"
        ref="editFormRef"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles(editForm.roleId)">
          确 定
        </el-button>
      </span>
    </el-dialog>
    <!-- 删除提示框 -->
    <template>
      <el-button type="text"></el-button>
    </template>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="showSetRightDialogVisible"
      width="50%"
      @close="showSetRightDialogClosed"
    >
      <!-- 树形空间 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色的数据
      roleList: [],
      // 添加角色的对话框的显示与否
      addDialogVisible: false,
      // 修改角色信息的对话框显示与否
      editDialogVisible: false,
      // 控制分配权限的对话框显示与否
      showSetRightDialogVisible: false,
      // 添加的角色的数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 修改角色的数据
      editForm: {},
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点的id值
      defKeys: [],
      // 分配权限时当前的角色id
      roleId: '',
      // 规则
      FormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    // 发送ajax请求
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.console.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    // 添加角色
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以添加用户的网络请求
        const { data: res } = await this.$http.post('/roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        // 添加用户的对话框关闭
        this.addDialogVisible = false
        // 重新渲染列表
        this.getRoleList()
      })
    },
    // 监听添加角色对话框的关闭时间
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 展示修改角色的编辑对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭时间
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息
    editRoles() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 可以修改觉醒信息的网络请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改失败')
        }
        // 修改角色的对话框关闭
        this.editDialogVisible = false
        // 重新渲染列表
        this.getRoleList()
        // 提示成功
        this.$message.success('修改成功')
      })
    },
    // 根据id删除对应的角色
    async removeRolesById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          type: 'warning',
          confirmButtonText: '确定',
          cancelButtonText: '取消'
        }
      ).catch(err => err)
      // 如果用户确认删除，贼返回职位字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getRoleList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          type: 'warning',
          confirmButtonText: '确定',
          cancelButtonText: '取消'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('取消权限成功')
      // 直接对roles赋值最新的权限 就不用调用getRoleList() 省一次页面渲染
      role.children = res.data
    },
    // 分配权限的对话框
    async showSetRightDialog(role) {
      // 为分配权限保留储存一个id
      this.roleId = role.id
      // 获取所有权限的数值
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取失败')
      this.$message.success('获取成功')
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.showSetRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有的三级权限的id，并保存刀defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前节点不包含children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    showSetRightDialogClosed() {
      this.defKeys = []
    },
    // 分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) return this.$message.error('分配失败')
      this.$message.success('分配成功')
      this.getRoleList()
      this.showSetRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
  margin: 0 20px;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
